itsMapleLeaf/LuaFunctional

Some useful functions for Lua 5.1

functional.lua

Defines F, a namespace for several list functions:

• F.count(obj)
• F.range(min, max, step)
• F.map(obj, func, f_pairs)
• F.reduce(obj, seed, func, f_pairs)
• F.any(obj, func, f_pairs)
• F.all(obj, func, f_pairs)
• F.none(obj, func, f_pairs)
• F.filter(obj, func, f_pairs)
• F.slice(obj, start, _end, f_pairs)
• F.id(...)
• F.index(obj)

Lazy sequences

Additionally, F.lazy is defined with a nearly identical interface to F (changes listed below). Functions in F.lazy return lazy sequences instead of tables. Lazy sequences may be more performant than eager ones, but they cannot be serialized and deserialized, since they use metatables.

• F.lazy.range has max default to infinity instead of 1.
• F.lazy.to_eager(obj) exists.